GraphicsContext.cpp
00001 00002 // 00003 // SFML - Simple and Fast Multimedia Library 00004 // Copyright (C) 2007-2009 Laurent Gomila ([email protected]) 00005 // 00006 // This software is provided 'as-is', without any express or implied warranty. 00007 // In no event will the authors be held liable for any damages arising from the use of this software. 00008 // 00009 // Permission is granted to anyone to use this software for any purpose, 00010 // including commercial applications, and to alter it and redistribute it freely, 00011 // subject to the following restrictions: 00012 // 00013 // 1. The origin of this software must not be misrepresented; 00014 // you must not claim that you wrote the original software. 00015 // If you use this software in a product, an acknowledgment 00016 // in the product documentation would be appreciated but is not required. 00017 // 00018 // 2. Altered source versions must be plainly marked as such, 00019 // and must not be misrepresented as being the original software. 00020 // 00021 // 3. This notice may not be removed or altered from any source distribution. 00022 // 00024 00026 // Headers 00028 #include <SFML/Graphics/GraphicsContext.hpp> 00029 #include <SFML/Window/Context.hpp> 00030 00031 00032 namespace 00033 { 00035 // One time initialization of 3rd party libraries. 00036 // We use a global function with a static boolean rather 00037 // than directly a global boolean, to avoid the randomness 00038 // of global variables initializations across compile units. 00040 void InitGraphicsLibs() 00041 { 00042 static bool InitDone = false; 00043 if (!InitDone) 00044 { 00045 // Initialize GLEW 00046 glewInit(); 00047 00048 InitDone = true; 00049 } 00050 } 00051 00052 } 00053 00054 00055 namespace sf 00056 { 00057 namespace priv 00058 { 00063 GraphicsContext::GraphicsContext() 00064 { 00065 // Activate the global context 00066 if (!Context::IsContextActive()) 00067 { 00068 Context::GetGlobal().SetActive(true); 00069 myActivated = true; 00070 } 00071 else 00072 { 00073 myActivated = false; 00074 } 00075 00076 // Make sure third party libraries are initialized 00077 InitGraphicsLibs(); 00078 } 00079 00080 00085 GraphicsContext::~GraphicsContext() 00086 { 00087 // Deactivate the global context 00088 if (myActivated) 00089 Context::GetGlobal().SetActive(false); 00090 } 00091 00092 } // namespace priv 00093 00094 } // namespace sf
:: Copyright © 2007-2008 Laurent Gomila, all rights reserved :: Documentation generated by doxygen 1.5.2 ::